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Earth Fault Relay

SKU: 9531 Category:

The Earth Fault Relay Trainer kit is a standalone unit useful for the students of Electrical Engineering to understand the operation of an Induction type relay for Earth Fault protection. Meters, terminals, indicators, knobs, timer display, Loading transformer, measuring CT & protection circuit etc. are all housed in an elegant cabinet with an intelligently designed layout on the panel. A comprehensive Instruction Manual complete with Theory, Operating details, block/circuit diagram, Observation table, etc will be supplied along with the unit.

Objective :

  • To study the construction of relay.
  • Test an relay in Earth Fault protection scheme.
  • To obtain the time and voltage characteristics of over current induction disc type relay

Technical Specification :

  • Relay Type : IDMT Earth Fault relay model Alsthom CDG-11
  • Input Voltage : 230V, Single phase 50Hz AC.
  • AC Current source : Inbuilt variable current 20 amp at 5 volt AC. Current output is continuously variable and the output is taken out thorough a C.T.
  • Time Measurement : Auto Range 0.0001 to 9999 sec.
  • Fixed range 0.9999 to 9.999 sec / 99.99 sec to 999.9 sec
  • Accuracy +/- 0.05% + 1 count
  • Loading Transformer : Double winding loading transformer of suitable burden to provide corresponding current output specified before.
  • Relay circuit diagram : On front panel
  • Metering : Digital Ammeter Basic Range : 0 to 5A AC. True rms measurement Accuracy 0.5% on full scale. 4 digit 7 segment display
  • Digital Voltmeter Basic Range : 50 to 480 Volt True rms measurement Accuracy 0.5% on full scale. 4 digit 7 segment display
  • Indicator : Main power supply, relay trip, alarm
  • Switches : Power on, start, mode select for cal and operate


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